.activities_over_div{
    width: 650px;
    /*border: 1px solid #000;*/
    position: relative;
    left: 50%;
    top: 55%;
    transform: translate(-50%,0%);
    text-align: center;
}
.activities_over_one{
    list-style: none;
    width: 300px;
    height: 200px;
    border-radius: 50px;
    box-shadow: 1px 1px 3px rgba(102, 102, 102, 0.35);
    display: inline-block;
    margin-right: 20px;
    margin-bottom: 20px;
    overflow: hidden;
}
.activities_over_one:hover{
    box-shadow: 1px 1px 10px rgba(102, 102, 102, 0.83);
    transition: 1s;
}
.activities_over_one:nth-child(2n){
    margin-right: 0;
}
.activities_img{
    width: 100%;
    height: 100%;

}